Solve the mathematical puzzle. determine the digits of f from these clues. the digits of f are all the same. the sum of all the digits of f is 12. the answer when any two of the digits are multiplied together is also 9. f is a four-digit number. 2222 3333 4444 5555

How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge